VICI Two Position Microelectric User Manual

Valco Instruments Co. Inc.

Two Position Microelectric

Technical Note 413

Valve Actuator

The microelectric actuator consists of a control module, a stepper motor/gearbox assembly, a manual
controller (use is optional), a universal AC input (100-240 VAC, 50-60 Hz) to 24 VDC power supply,
and the interconnecting cables. The actuator is self-adjusting from 30° to 90° – no valve alignment is
necessary. Once a valve is installed by tightening the clamp screw, the actuator senses the positive
stops within the valve and memorizes them in the first four moves.

The time it takes a valve to cycle from Position A to Position B
depends on the amount of rotation involved. To determine the
number of degrees in the angle of rotation, divide 360° by the
number of ports in the valve. Then consult the table at right.

Installation and Use

(Control module serial numbers starting with EM2C)*

90

115

150

235

ED

140

175

235

300

EQ

EH EP

36°

45°

60°

90°

Switching times in milliseconds

60

70

85

115

70

85

110

145

ET

330

410

500

710

Getting Started

Figure 1 on the next page shows how to connect the various actuator components. There are four

connectors on the control module, keyed and sized to prevent incorrect connection.

Cable and Connector Functions

Input power

a coaxial connector: the inner pin is + voltage and the outer pin is ground.
The average DC current requirement is 2.5 amps. Standby current draw
is 60 milliamps. The actuator should not share a power supply with
other noise-sensitive electronics, as the high current draw can cause
problems.

Motor driver output

carry the stepper motor phase drive signals. Pin 3 is grounded and
tied to the cable shield to reduce electrical noise.

A three-pin connector is used for the
pin 2 is transmit to the host computer, and pin 3 is receive from the
host. (A discussion on serial control of the actuator starts on page 3.)

(20-30 VDC , with 24-28 VDC pref erred) is supplied through

is through the five-pin connector: pins 1, 2, 4, and 5

RS-232 interface

: pin 1 is ground,

Pin # Signal Description

Input Power Cable

inner +20-30 VDC power

outer Ground

Motor Driver Output Cable

1 Phase B

2 Phase B

3 Ground

4 Phase A

5 Phase A

The ten-pin connector is for the
controlled by
provide simultaneous control by an external system. (Digital control of the actuator is discussed on
page 3.)

* Serial numbers are on the underside of the control module. (Figure 2) Actuators of this series are further identified by a metallic

control module housing. If your actuator control module has a plastic housing and a serial number starting with E2CA, please refer to
Technical Note 421.

either

or

both

manual controller

. The manual controller has a through por t, so an additional cable can

or for

digital input/output signals

1

; the actuator can be

TO 110 OR 220 V A C
(User must supply other
line cord configurations)

TO

EXTERNAL

CONTROL

SYSTEM

LINE CORD (IEC-320)
P/N I-W-17600

+24-28 VDC

GND

DIGIT AL INPUT/
OUTPUT CABLE
P/N I-22537

POWER SUPPL Y

P/N PS24VDC-CE

BLACK / WHITE STRIPE

BLACK

OPTIONAL
INPUT POWER CABLE
P/N I-22535-CE

MOTOR DRIVER
OUTPUT CABLE

P/N I-22645

MANUAL

CONTROLLER

(Use optional)

P/N I-22689

POSITIONAPOSITION

PIN 1

B

PIN 1

CLAMP

SCREW

MOTOR/GEARBOX
ASSEMBL Y
P/N EQMA (Highest speed)

EHMA (High speed and

Medium torque)
EDMA (High torque
ETMA (Highest torque)

MOUNTING

BRACKET

PIN 1

P/N I-22596

2 POSITION ACTUATOR
CONTROL MODULE

CLAMP
RING

POSITION

AB

POSITION
INDICATOR
LIGHTS

Valco Instruments Co. Inc.

P/N:
EQCA-CE (Highest speed)
EHCA-CE (High speed)
EPCA-CE (Medium torque)
EDCA-CE (High torque)
ETCA-CE (Highest torque)

PIN 1 PIN 1

TO COMPUTER

MANUAL CONTROLLER CABLE
P/N I-22537-01

DB-9
CONNECTOR
(FEMALE)

Figure 1: Actuator and controller connections

OPTIONAL
SERIAL PORT
(RS-232) CABLE
P/N I-22697

2